Process of forming concrete piles



PATENI'ED FEB. 9, 1904.

P. SHUMAN. vPROCESS 0F Pom/LING CONCRETE PILES.

APPLICATION FILED JUNE 25, 11903.

N0 MBEL.

ma cams Pzrias co, Now-umu.. WASHINGTON. u. c.

Patented February 9, 1904.

PATENT OFFICE.

FRANK SHUMAN, OF PHILADELPHIA, PENNSYLVANIA.

PROCESS OFFQBMING CONCRET PILES.

SPECIFICATION forming part of Letters Patent No. 752,003, dated February9, 1904.

Oliginal application led April 23, 1903, Serial No.

and this application llled T une 25, 19.03.

To (11M whom t may concern.-

Be it known that I, FRANK SHUMAN, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented a certain ImprovedProcess of Forming Concrete Piles, (the same being a division of myapplication, Serial No. 160,190, tiled .I une 5, 1903, as a divisionoit' my application, Serial No. 153,974, iiled April 23, 1903,) of whichthe following is a specification.

My invention relates to that method of form-l ing piles of concrete orcement which consiste in iirst driving a preparatory vpile into theground, then withdrawing saidl preparatory pile, and then filling theopening formed thereby with concrete or cement in iiuid or plastic form,which when it sets forms the permanent pile.

The object of my invention is to so construct such apreparatory pilethat it can be empioyed as a means for introducing into the opening abase or foundation for the reception of the mass of concrete which is toform the permanent pile.

In the accompanying drawings, Figure 1 is a vertical section of aremovable preparatory pile constructed in accordance with my invention,showing the pile driven into the ground in order to form the opening forthe subsequent reception of the permanent pile; and Fig. 2 is a similarview showing the permanent pile produced by iilling the opening withcement or concrete after the withdrawal of the preparatory pile.

The pile consists of ame-tal tube 1, although it may be a solid pile, ofwoodvor metal, if desired, this pile being provided at the top with asuitable driving-head 2 and at the bottom with a point 3, which isdetachable from the 153,974. Divided and application iled June 5,1903,^Serial No. 160,190. Divided Serial No. 16 3,113. (No specimens.)

pile 1, so that when said pile is driven into the ground the point willbe forced ahead of it until a hole of the desired depth hasbeenproduced, whereupon the pile 1 can be withdrawn, leaving the point 3 atthe bottom of the hole. T he concrete or other plastic material of whichthe permanent pile is to be composed is then introduced into the holeabove the point, and when it becomes set said concrete forms thepermanent pile 5, as' shown in Fig. 2, the point 3 at the bottom of thehole constituting an effective base or foundation for said pile, sinceit is firmly seated in the ground, the latter having been compacted bythe point in the driving of the same, for the point is tapered for thedouble purpose of facilitating entry of the same and eecting the desireddisplacement or compacting of the earth without tearing or disruptingthe walls of the hole. The point can be made of any material which willwithstand the shock of driving.

Having thus described my invention, I claim and desire to secure byLetters Patent- The method of making concrete piles which consists inproviding a pile with a detachable point, driving said pile to displacethe earth,

withdrawing the pile, without the point, and after the withdrawal of thepile filling the opening, above said point, with concrete or otherplastic material and permitting the same to set, substantially asspecified.

In testimony whereofIhave signed my name to this specification in thepresence of two subscribing witnesses.

FRANK SHUMAN.

Witnesses F. E. BnonroLn, Jos. HKLEIN.

